docker-compose.yml

# Infrastructure only — Spring Boot services run locally via ./gradlew bootRun
# PostgreSQL: local instance on localhost:5432
# Kafka: trackflow-kafka on localhost:9093 (9092 reserved for observability stack)
#
# Start:  ./scripts/up.sh
# Stop:   ./scripts/down.sh
# Smoke:  ./scripts/smoke.sh

services:
  kafka:
    image: apache/kafka:3.7.1
    container_name: trackflow-kafka
    environment:
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_LISTENERS: PLAINTEXT://:9093,CONTROLLER://:9094
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9093
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka:9094
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: "true"
      KAFKA_NUM_PARTITIONS: 3
      KAFKA_LOG_DIRS: /tmp/kraft-combined-logs
      CLUSTER_ID: MkU3OEVBNTcwNTJENDM2Qk
    ports:
      - "9093:9093"
    healthcheck:
      test: ["CMD-SHELL", "/opt/kafka/bin/kafka-topics.sh --bootstrap-server localhost:9093 --list >/dev/null 2>&1"]
      interval: 5s
      timeout: 5s
      retries: 20
      start_period: 20s